Wall board and the like for covering walls



Patented Sept. 1, 1931.

. UNITED STATES PATENT OFFICE FBIEDBIGH ABRASSARD, BAD GODIESBEBG, GEBIAHY, ASSIGII'OB 1'0 THMDOBE mm, as raus'rar, or rncxsvnan.

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This invention relates to improvements in wallboards and the like for covering walls, and for use in the construction of artitions and ceilings; especially wallboar of this 5 type which can be hardening the materials composing them. An ob ect of this invention is to provide a plate or board consisting primarily of asand n which isespecially adapt- 1 ed for wall cover-in pm- Another object o the vide a wallboard which can be given a durable and attractive coating of any selected color.

A further object of the invention is to 1 provide a wallboard which is of low cost and gzeat strength and which will have a superior ished appearance;

The plates or boards produced according tothis invention are provided with a coating go which consists of cellulose-ester lacquer.

This coating may contain an addition consistingxf resins, oils, etc. and be colored as desire Wallboard's according to this invention ss many advantages over previous rds' made for the same purpose. Plates, boards and the like for covering walls have been manufactured of clay or porcelain-like material which was either colored throughout or in the glazing process. The produc-' tion of suchv plates is diflicult and-expensive,

especially where repeated firing is necessary.- 'This is particularly true for bright colors.

as these can'only be obtained by glazing; and then only to. a limited extent.

Ordinary painting with lacquer or enamel has also not proved satisfactory, for plates so treated do not stand transportation very well and areafi'ected by mortar when being put into place.

40 Less costly than the clay and porcelain plates or boards produced by firing are plates or. boards consisting .ofv cement to which mineral fibrous material, such as asbestos is added where no firing is required. But these plates also possess essential disadvantages with regard to imparting colorsto them. They can, however, be colored throughout their mass, but onlyin a few dull colors, the production of which requires expensive color- E' ing material. It is not possible when Oldlproduccd by mixing and.

invention is to pro-- LONG ISLAND, msw YORK Application Med January 21, 1929, Serial a. 334,119, and ni- Germany September a, 1m.

nary lacquer or enamel is employed to cover such plates cheaply and get all tints starting from dull up to the bright and glossy shades, either in one color or in pattern; for the reason that the substances used with the enamel and ordinary lacquer do not stick to the cement proper, or cannot withstand the strain of transportation or the handling. On the other hand, cellulose-ester lacquers, for instance cellulose-nitrate lacquers, alone or in connection with resins, oils, etc, produce firmly adhering coatings which ai'e very resistant to hot and cold water, soap, soda and acid solutions and other cleaning and disinfifecting substances, etc., as well-as weatherproof. These coatings also possess great strength and durability against mechanical stress, and become hard. The coatings can be colored in any manner with in all variations, from dull to highly; finished glossy For the reason that the customary oil and resinous enamel colors do not adhere to oement and would soon be destroyed by the alkaline action thereof, the extraordinary adhesiveness of the cellulose-ester lacquer to the mass of cement and asbestos and the durability of the coating on the wallboards was quite unexpected when its discovery was made.

With this invention, one can produce at relatively small expense durable plates or wallboards, strong enough to resist breakii'ig and with fine colored coatin dull, or wi a gloss. They are used for ospitals, baths, etc., and are equal in all respects to the expensive glazed porcelain plates heretofore used.

Sometimes slate in the form and size made necessary can be mixed with the asbestos and cement. i

As a further improvement the wallboard of asbestos cement and slate (if present) may be made by adding colored bodies to give the appearance of marble or granite.

In place of the colored bodies, or in addition thereto, other materials ma be used which are suitable for obtaining t e marblelike appearance. Such other materials are for instance mother of pearl chips, or scales of 1N fish. The colorless or colored cellulose-esterlacquer then serves not only to provide the rough surface of the board with a weather-.

proof, clean and sanitary coating but also to produce theeflect of marble or granite that has been polished.

A special effect can mineral fibrous material for instance, asbestos, in the board is tinted by suitable coloring material, especially tar colors.

I claim:

1. The herein described wallboard comprising a composition body containing therein colored particles in simulation of marble, and ap'rotective plain coating, unglazed, un ainted and non-enameled,'covering said b y and consisting of a cellulose-ester softening agent, I

resistant to hot and cold water and waterproof 2; The herein described wallboard com rising a body consisting of cement and bre mother of pearl or fishscales incorporated therewith, and a (plain protective coating unlazed, unpainte' and non-enameled, covermg the entire surface of said body and consisting of a cellulose-ester softening agentre-, 'sistant to hot and cold water and water-proof.

3. The herein described wallboard comprising a comgosition body including a cement base and fi re, colored particles incorporated with the base and fibre whereby they are'-giv-. en amarble-like appearance, and non-metal! lic water-proof protective coating, unglazed,

' unpainted andnon-enameled and resistant to hot and cold water, covering the entire surface of the body and adapted to complete the marble-like efl'ect.

In testimony that I claim thefore oing as my invention, I have signed my name hereto.

- FRIEDRICH r BRASSARD.

be obtained in case the 

